Streetcar service to Cambridge begins.

Operated by the Cambridge Street Railroad Company, the horse-drawn line runs from Bowdoin Square in Boston along Cambridge Street to Central Square in Cambridge. It is the first horse-drawn streetcar line in New England (the first in the world was in New York City in 1832). By the 1870s, streetcars expand the commuting radius in Boston to 2 1/2 miles, and by the 1880s to four miles. Almost all of the lines are consolidated under a single operator in 1887.* Electric streetcars are introduced on the line in 1889.*